Dunkirk Q90-125, Installation, Operation & Maintenance Manual, Page: 5 / 44

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TABLE #3 - LP GAS
Nominal Input
200,000 175,000 150,000 125,000
Vent Lengths Vent Lengths Vent Lengths Vent Lengths
Altitude Min. Max Min. Max Min. Max Min. Max
0 200,000 200,000 175,000 175,000 150,000 150,000 125,000 125,000
1,000 195,900 195,750 171,900 171,200 146,900 146,700 123,050 122,250
2,000 191,800 191,500 168,800 167,400 143,800 143,400 121,100 119,500
3,000 187,700 187,250 165,700 163,600 140,700 140,100 119,150 116,750
4,000 183,600 183,000 162,600 159,800 137,600 136,800 117,200 114,000
5,000 179,500 178,750 159,500 156,000 134,500 133,500 115,250 111,250
6,000 175,400 174,500 156,400 152,200 131,400 130,200 113,300 108,500
7,000 171,300 170,250 153,300 148,400 128,300 126,900 111,350 105,750
8,000 167,200 166,000 150,200 144,600 125,200 123,600 109,400 103,000
9,000 163,100 161,750 147,100 140,800 122,100 120,300 107,450 100,250
10,000 159,000 157,500 144,000 137,000 119,000 117,000 105,500 97,500
These low pressure gas-fi red hot water boilers are design
certifi ed by CSA International, for use with natural
and propane gases. The boilers are constructed and
hydrostatically tested for a maximum working pressure of
50 psig (pounds per square inch gauge) in accordance with
A.S.M.E. (American Society of Mechanical Engineers) Boiler
and Pressure Vessel Code, Section IV Standards for heating
boilers.
Boilers are certifi ed in accordance with ANSI (American
National Standards Institute) Z21.13 standards as gas-
fi red, direct vent, condensing, hot water boilers.
Heating Capacity indicates amount of heat available
after subtracting losses up the stack. Most of this heat is
available to heat water. Small portion is heat loss from
jacket and surfaces of boiler, it is assumed this heat stays
in the structure. Net I=B=R Rating represents portion
of remaining heat applied to heat radiation or terminal
units (i.e. Finned tube baseboard, cast iron radiators,
radiant fl oor, etc.). Difference between Heating Capacity
and Net I=B=R Rating, called piping and pickup allowance,
establishes reserve for heating volume of water in the
system and offsetting heat losses from piping. Net I=B=R
Ratings shown are based on piping and pickup factor of
1.15. Net I=B=R Rating of boiler selected should be greater
than or equal to calculated peak heating load (heat loss)
for building or area(s) served by boiler and associated hot
water heating systems. Manufacturer should be consulted
before selecting boiler for installations having unusual
piping and pickup requirements
.
Complete the following prior to installing boiler.
Codes
This boiler product is a gas-fi red, direct vent, condensing
boiler. Installation must conform to the requirements of
authority having jurisdiction or, in the absence of such
requirements:
United States • - National Fuel Gas Code, NFPA 54/
ANSI Z223.1
Canada
• - Natural Gas Propane Installation Code,
CAN/CSA B149.1
Where required by the authority having jurisdiction,
installation must conform to the Standard for Controls and
Safety Devices for Automatically Fired Boilers, ANSI/ASME
CSD-1
.
BOILER RATINGS & CAPACITIES
BEFORE INSTALLING THE BOILER